European Co-Located Renewable and Battery Storage Projects Set to Surge 450% by 2030 as Grid Congestion and Curtailment Drive Investment
New research published today reveals that European renewable energy projects paired with battery storage (systems that store excess electricity generated by wind or solar for use when generation falls) are expected to grow by more than 450% by 2030, driven by mounting grid congestion, falling power prices, and rising curtailment — the forced reduction of output from renewable generators when the grid cannot absorb it. Europe's co-located renewable and storage capacity reached 6.3 GW (gigawatts) in 2025, with solar-plus-storage projects accounting for more than 60% of deployments. The scale of the grid queue is striking: more than 1,600 GW of renewable and storage capacity is currently awaiting grid connections across the continent, including approximately 550 GW in Great Britain alone. For UK energy lawyers and their clients, the Great Britain queue figure is particularly significant. The backlog reflects systemic constraints in the National Grid connection regime, where projects routinely face multi-year waits and uncertain connection dates. Ofgem has been engaged in ongoing reform of the connections process — the *Connections Action Plan* — and the scale of queued capacity underlines the urgency of that reform agenda for developers and lenders seeking to finance projects whose grid connection dates remain uncertain.
Why this matters
A 450% projected growth in co-located renewable-plus-storage projects by 2030 generates sustained transactional and regulatory advisory demand across the energy practice. Developers need grid connection agreements analysed and negotiated, project finance structures designed around uncertain connection timelines, and regulatory filings coordinated as Ofgem's connections reform continues. The 550 GW queued in Great Britain alone signals that grid connection rights have become a primary value driver in UK energy project M&A — buyers are increasingly acquiring projects primarily for their queue position rather than their generation assets. Battery storage assets also attract complex structuring questions around co-location rules, revenue stacking from multiple grid services, and the interaction of storage-specific licences with generation licences under the Electricity Act 1989.
On the Ground
A trainee on an energy storage project deal would be asked to review and summarise grid connection agreement terms — particularly the long-stop dates and termination rights that determine when a project lapses out of the queue — and to prepare a regulatory filing checklist for any capacity market or Contracts for Difference (CfD) applications. They might also assist with due diligence on an IP portfolio covering proprietary battery management software if the target owns its own storage technology.
Interview prep
Soundbite
Grid queue rights are now the scarcest asset in UK renewable energy — connection reform will reshape project values across the sector.
Question you might get
“How does the uncertainty around a grid connection date affect how a project finance lender structures a loan for a renewable energy project in the UK, and what contractual protections would you expect to see in the facility agreement?”
Full answer
Research published today projects a 450% surge in European co-located renewable and battery storage projects by 2030, with over 550 GW of capacity queued for grid connections in Great Britain alone. This backlog has made grid connection rights a primary commercial variable in energy project M&A and project finance, with developers and lenders pricing deals around uncertain connection timelines that Ofgem's ongoing connections reform is designed to shorten. The scale of curtailment driving storage deployment also creates a new layer of regulatory complexity: co-located storage assets must navigate rules governing capacity market participation, grid services revenue, and licence conditions that were not designed with hybrid assets in mind. This sustained investment pipeline — across development, financing, and M&A — makes energy storage one of the most active areas in UK energy law through the decade.
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